Are you dieting and not losing weight? More than likely, some common diet mistakes are tripping you up.

The truth, experts say, is that even when you're "on a diet," you may be eating a lot more calories than you think. There's often a disconnect between what we know we should do to lose weight, and what we actually do while trying to diet.

For starters, stop thinking about dieting. Instead, take a look at those everyday habits that could be causing weight gain. Going on a diet can create an obsession with food, heighten cravings, and lead to a "throw-in-the-towel-because-diets-don't-work" mentality.

You might not realize just how quickly calories can add up. An extra tablespoon of salad dressing can add 75-100 calories, an extra tablespoon of butter adds 102 calories, and that 1-ounce bag of chips with your sandwich at lunch adds 162 calories. Eating while cooking, starting each day with a high-calorie coffee drink, finishing off the kids' plates at dinner, or having one too many glasses of wine -- these are just a few of the sneaky habits that sabotage weight loss efforts.

Yet as quickly as calories can add up, they can be subtracted. Becoming mindful of your diet mistakes -- the subtle ways that calories sneak into your diet throughout the day - can add up to real weight loss.